U.S. patent application number 12/951082 was filed with the patent office on 2011-05-26 for lcd device and display panel of the device.
This patent application is currently assigned to CHIMEI INNOLUX CORPORATION. Invention is credited to CHUNG-KAI WANG.
Application Number | 20110122331 12/951082 |
Document ID | / |
Family ID | 44061842 |
Filed Date | 2011-05-26 |
United States Patent
Application |
20110122331 |
Kind Code |
A1 |
WANG; CHUNG-KAI |
May 26, 2011 |
LCD DEVICE AND DISPLAY PANEL OF THE DEVICE
Abstract
A liquid crystal display device includes a liquid crystal
display panel and a flexible printed circuit board electrically
connected to the liquid crystal display panel. The liquid crystal
display panel includes a first substrate and a controller disposed
on the first substrate. The controller is accommodated in a space
between the first substrate and the flexible printed circuit board,
and is covered by the flexible printed circuit board.
Inventors: |
WANG; CHUNG-KAI; (Miao-Li
County, TW) |
Assignee: |
CHIMEI INNOLUX CORPORATION
Miao-Li County
TW
|
Family ID: |
44061842 |
Appl. No.: |
12/951082 |
Filed: |
November 22, 2010 |
Current U.S.
Class: |
349/43 ;
349/158 |
Current CPC
Class: |
G02F 1/133334 20210101;
G02F 1/13452 20130101 |
Class at
Publication: |
349/43 ;
349/158 |
International
Class: |
G02F 1/136 20060101
G02F001/136; G02F 1/1333 20060101 G02F001/1333 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 23, 2009 |
TW |
98139676 |
Claims
1. A liquid crystal display device comprising: a liquid crystal
display (LCD) panel comprising a first substrate and a controller
disposed on the first substrate; and a flexible printed circuit
board electrically connected to the liquid crystal display panel;
wherein the controller is accommodated in a space between the first
substrate and the flexible printed circuit board, and is covered by
the flexible printed circuit board.
2. The liquid crystal display device of claim 1, wherein the LCD
panel comprises a display region and a peripheral circuit region
adjacent to the display region, and the controller disposed on the
peripheral circuit region.
3. The liquid crystal display device of claim 2, further comprising
a second substrate and a liquid crystal layer sandwiched between
the first substrate and the second substrate, the first substrate
being longer than the second substrate so that a portion of the
first substrate is exposed outside of the second substrate and
defines an extending strip, and the controller disposed on the
extending strip.
4. The liquid crystal display device of claim 3, wherein a thin
film transistor (TFT) array is disposed at the display region of
the first substrate.
5. The liquid crystal display device of claim 4, wherein the
extending strip comprises a first side and a second side opposite
to the first side, the first side being adjacent to the display
region of the first substrate, the second side being a free end of
the first substrate, and the flexible printed circuit board
electrically connected to the second side of the extending
strip.
6. The liquid crystal display device of claim 5, wherein the
flexible printed circuit board comprises a fixing portion and a
bent portion, the fixing portion bonded to the second side of the
extending strip, and the bent portion covering the controller.
7. The liquid crystal display device of claim 6, wherein the fixing
portion is bonded at a surface of the extending strip which faces
generally toward the second substrate.
8. The liquid crystal display device of claim 6, wherein the
flexible printed circuit board comprises a pin portion configured
to connect with an external circuit.
9. The liquid crystal display device of claim 8, wherein the pin
portion extends from a lateral side of the bent portion.
10. The liquid crystal display device of claim 8, wherein an
incision is defined between the bent portion and the pin portion,
the incision enabling the bent portion to be bent relative to the
pin portion.
11. The liquid crystal display device of claim 1, wherein the
flexible printed circuit board comprises at least two insulating
layers and a metal layer sandwiched between the two insulating
layers.
12. The liquid crystal display device of claim 1, wherein the
flexible printed circuit board electrically connects the
controller.
13. A liquid crystal display device comprising: a liquid crystal
display panel comprising a controller, the controller configured
for driving the liquid crystal display panel; and a flexible
printed circuit board comprising a metal layer; wherein the metal
layer of the circuit board covers and shields the controller.
14. The liquid crystal display device of claim 15, wherein the
liquid crystal display panel comprises a display region and a
peripheral circuit region adjacent to the display region, and the
controller disposed on the peripheral circuit region.
15. The liquid crystal display device of claim 15, further
comprising a first substrate, a second substrate and liquid crystal
layer sandwiched between the first substrate and the second
substrate, the second substrate being longer than the first
substrate, so that a portion of the second substrate is exposed
outside of the first substrate and defines an extending strip, and
the controller disposed on the extending strip.
16. The liquid crystal display device of claim 15, wherein a thin
film transistor (TFT) is disposed at the display region of the
second substrate.
17. A liquid crystal display device panel comprising: a flexible
printed circuit board comprising a metal layer; and a thin film
transistor (TFT) substrate comprising a controller; wherein the TFT
substrate comprises a display region and a peripheral circuit
region adjacent to the display region, the controller is disposed
on the peripheral circuit region, and the controller is shielded by
the metal layer of the circuit board.
18. The liquid crystal display device panel of claim 17, the TFT
substrate being longer than that of the color filter substrate, so
that a portion of the TFT substrate is exposed outside of the color
filter substrate and defines an extending strip, and the controller
disposed on the extending strip.
19. The liquid crystal display device panel of claim 18, wherein
the controller is accommodated in a space between the TFT substrate
and the flexible printed circuit board, and is covered by the
flexible printed circuit board.
20. The liquid crystal display device panel of claim 17, wherein
the flexible printed circuit board electrically connects the
controller.
Description
BACKGROUND
[0001] 1. Technical Field
[0002] The present disclosure relates to display technology, and
more particularly to a liquid crystal display (LCD) device and a
panel of the LCD device.
[0003] 2. Description of Related Art
[0004] LCD devices are commonly used because of their good image
quality and minimal profile. An LCD panel is a main component of an
LCD device, and is for displaying images according to received
signals. A typical LCD panel includes a first substrate, a second
substrate and a liquid crystal layer sandwiched between the first
substrate and the second substrate. A controller may be mounted on
the second substrate via chip on glass (COG) technology, and is for
controlling pixel voltages at the liquid crystal layer to generate
a desired luminous flux of the LCD panel.
[0005] The high signal-transmitting speeds of the controller can
emit electromagnetic radiation. The electromagnetic radiation may
damage the surrounding elements and disrupt operation of the LCD
panel.
[0006] What is needed, therefore, is an LCD device that can
overcome the described limitations.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Many aspects of the embodiments can be better understood
with reference to the following drawings. The components in the
drawings are not necessarily drawn to scale, the emphasis instead
being placed upon clearly illustrating the principles of the
present LCD panel. In the drawings, like reference numerals
designate corresponding parts throughout the various views, and all
the views are schematic.
[0008] FIG. 1 is an exploded, isometric view of a first embodiment
of an LCD device according to the present disclosure.
[0009] FIG. 2 is a partly assembled view of the LCD device of FIG.
1.
[0010] FIG. 3 is a fully assembled view of the LCD device of FIG.
1.
[0011] FIG. 4 is an enlarged cross-section of part of the LCD
device taken along line IV-IV of FIG. 3.
[0012] FIG. 5 is an exploded, isometric view of a second embodiment
of an LCD device according to the present disclosure.
[0013] FIG. 6 is a fully assembled view of the LCD device of FIG.
5.
DETAILED DESCRIPTION
[0014] Reference will now be made to the drawings to describe the
present disclosure in detail.
[0015] Referring to FIG. 1 to FIG. 4, a first embodiment of an LCD
device 100 according to the present disclosure includes an LCD
panel 1, a flexible printed circuit (FPC) board 2, and a backlight
module 4. The backlight module 4 is located adjacent to the LCD
panel 1, supplying illumination thereto. The FPC board 2 is
connected to the LCD panel 1, with a fixing end of the FPC board 2
fixed on an edge of the LCD panel 1.
[0016] The LCD panel 1 may include a first substrate 12 and a
second substrate 13. The first substrate 12 and the second
substrate 13 are opposite to each other, and a liquid crystal layer
(not shown) is sandwiched therebetween. The second substrate 13 may
be a thin film transistor (TFT) substrate, and the first substrate
12 may be a color filter (CF) substrate. The second substrate 13
includes a display region, and a peripheral circuit region disposed
adjacent to the display region. In this embodiment, the second
substrate 13 is longer than the first substrate 12, such that a
portion of the second substrate 13 extends beyond the first
substrate 12. The exposed portion of the second substrate 13 forms
an extending strip 130. At least part of the peripheral circuit
region is located at the extending strip 130. A TFT array may be
disposed at the display region, and a controller 10 may be disposed
at the peripheral circuit region. The controller 10 is electrically
connected to the TFT array of the LCD panel 1 and configured to
control the TFT array. The extending strip 130 includes two
opposite sides, such as a first side (not labeled) and a second
side (not labeled). The first side is adjacent to the display
region of the second substrate 13. The second side is a free end of
the second substrate 13.
[0017] The LCD panel 1 may further include a plurality of optical
components. For example, a first polarizer 11 may be disposed over
the first substrate 12, and a second polarizer 14 may be disposed
beneath the second substrate 13.
[0018] The FPC board 2 includes at least two insulating layers (not
shown) and a metal layer (not shown). The metal layer is sandwiched
between the two insulating layers. The metal layer includes many
lines to transmit electrical signals. The FPC board 2 includes a
fixing portion (not labeled), a bent portion (not labeled), and a
pin portion (not labeled). The fixing portion may be located at an
end of the FPC board 2 for fixing the FPC board 2 to the second
substrate 13. The fixing portion may be bonded at an edge portion
of an upper surface of the extending strip 130. The bent portion is
bent toward the display region and covers at least portion of the
peripheral circuit region. The controller 10 thus may be covered by
the bent portion. The pin portion extends from a lateral side of
the bent portion. Some electrical components 21, such as a mini
Integrated Circuit and a capacitance, may be mounted at a surface
of the FPC at the fixing portion and/or the bent portion, and are
accordingly covered by the bent portion.
[0019] Specifically, the FPC board 2 may be a flexible board which
includes a first side "a", two opposite second sides "b" and "d",
and a third side "c" opposite to the first side "a". The second
sides "b" and "d" connect to the first side "a". In this
embodiment, the second side "d" is shorter than the second side
"b", and the pin portion is disposed adjacent to the second side
"d". The third side "c" is step shaped. The third side "c" includes
a fourth side "c1" and a fifth side "c2" parallel to the first side
"a", and a sixth side "c3" perpendicularly connecting the fourth
side "c1" and the fifth side "c2". The fourth side "c1" is
connected to the second side "d". The fifth side "c2" adheres to
the second end of the extending strip 130, and has the same length
as the second end of the extending strip 130. The fixing portion is
disposed adjacent to the fifth side "c2". The fifth side "c2" is
connected to the second sides "b".
[0020] When the FPC board 2 is bent, the first side "a" adheres to
an end of the first substrate 12 so as to cover the controller 10.
The sixth side "c3" is bent. The second side "d" corresponds to a
free end of the pin portion, and the pin portion is able to connect
with an external circuit and receive and transmit signals from and
to the external circuit. The electrical components 21 and the
controller 10 are disposed separately and do not influence each
other.
[0021] The backlight module 4 includes an optical film assembly 41,
a light source 42, a frame 43, a light guide plate 44, and a
reflector 45. The frame 43 includes four sidewalls (not labeled)
connected end to end. One of the four sidewalls 433 includes a
notch 430. The width of the notch 430 is greater than or equal to
that of the second side "d". The light guide plate 44 includes a
top light emitting surface 441, a light incident surface 442
adjacent to the light emitting surface 441, and a bottom surface
443.
[0022] The optical film assembly 41, the light source 42, the light
guide plate 44, the reflector 45, and the LCD panel 1 are
accommodated in the frame 43. The light source 42 is disposed
adjacent to a light incident surface 442 of the light guide plate
44. The reflector 45 is disposed adjacent to the bottom surface 443
of the liquid guide plate 44. The optical film assembly 41 is
disposed adjacent to the light emitting surface 441 of the light
guide plate 44. The LCD panel 1 is disposed adjacent to the optical
film assembly 41, and supported by the sidewalls of the frame 43.
The pin portion of the FPC board 2 extends out of the frame 43 via
the notch 430.
[0023] During assembly, the FPC board 2 bends and covers the
controller 10. The metal layer of the FPC board 2 shields the
surroundings from electromagnetic radiation emanating from
controller 10. The FPC board 2 further protects the controller 10
from electromagnetic interference (EMI) generated by other nearby
high-speed devices, as well as from static electricity.
[0024] Referring to FIG. 5 to FIG. 6, an LCD device 700 according
to a second embodiment is shown, differing from LCD device 100 in
that only a portion of a peripheral circuit region of the LCD panel
7 is covered and shielded by an FPC board 3. The FPC board 3 may
have an L shape, and when unbent may be formed by sides "e", "f",
"g", "h", "i", and "j" connected in that order. The side "e" is
parallel to the side "i". The side "f" is parallel to the side "h".
The side "j" and side "g" are two ends of the FPC board 3. The
length of the side "f" is as same as the length of a second end of
an extending portion 137, and a fixing portion of the FPC board 3
is disposed adjacent to the side "f". The side "f" adheres to a
second end of the extending portion 137. An incision is formed
between the side "i" and the side "h" so that the side "h" can bend
up. A pin portion (not labeled) is disposed near the sides of "e",
"j", "i", "k", and "f". The bent portion is formed by the part of
the sides "k", "h", "g" and "f". The sidewalls of the frame 73
include a sidewall 730. The pin portion extends out of the sidewall
730, to connect with an external circuit and receive and transmit
signals from and to the external circuit. The side "h" is bent up
to adhere to the extending portion 137, and thereby covers a
controller 101.
[0025] In other variations of the first embodiment, the first side
"a" can adhere to a top surface of the first polarizer 11, and
thereby cover the controller 10. Furthermore, the LCD device 100
can also include a metal sheet to cover the controller 10, with the
FPC board 2 covering the metal sheet.
[0026] It is to be further understood that even though numerous
characteristics and advantages of the present embodiments have been
set forth in the foregoing description, together with details of
the structures and functions of the embodiments, the disclosure is
illustrative only; and that changes may be made in detail,
especially in matters of shape, size, and arrangement of parts,
within the principles of the embodiments, to the full extent
indicated by the broad general meaning of the terms in which the
appended claims are expressed.
* * * * *